Self-gravitational collapse of a magnetized cloud core: High resolution simulations with three-dimensional MHD nested grid

Tomoaki Matsumoto, Masahiro N. Machida, Kohji Tomisaka, Tomoyuki Hanawa

研究成果: Contribution to journalConference article査読

1 被引用数 (Scopus)

抄録

We investigate self-gravitational collapse of magnetized molecular cloud cores and formation of the outflow. We employ a nested grid in order to resolve fine structures of protostar and outflow generation, of which size is as small as 1 AU, and to follow the whole structure of the molecular cloud core, of which radius reaches 0.1-1 pc, simultaneously. The nested grid allows us to follow the evolution of the cloud core with the high dynamic range of 105-106 in the spatial resolution. In this paper, we introduce implementations of the self-gravitational MHD nested grid code and show applications to early stages in star formation: gravitational collapse of cloud core, "first core" formation, and bipolar outflow ejection. In both cases of single and binary star formation, magnetic fields play important role in the outflow formation. The outflow region has extremely low beta regions of β= 10 -6-10-3, and our code shows no sign of numerical instability even in these low-beta regions.

本文言語英語
ページ(範囲)229-236
ページ数8
ジャーナルComputer Physics Communications
164
1-3
DOI
出版ステータス出版済み - 12 1 2004
外部発表はい
イベントProceedings of the 18th International Conference - Falmouth, 米国
継続期間: 9 7 20039 10 2003

All Science Journal Classification (ASJC) codes

  • Hardware and Architecture
  • Physics and Astronomy(all)

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